Quiz 6

1. What kinds of particles are atoms made of?
a. Ions, neutrons, and molecules.
b. Protons, neutrons, and electrons.
c. Ions, neutrons, and electrons.
d. Protons, neutrons, and molecules.

2. How many protons does a hydrogen atom have?
a. 0.
b. 1.
c. 2.
d. 4.

3. What is a plasma?
a. A solid which is so cold that all atoms are stuck together.
b. A liquid which is so sticky that it is almost a solid.
c. A gas which is about to condensate into a liquid.
d. Matter which has been heated so much that most atoms are ionized.

4. A red apple has that color because red light is
a. Emitted by the apple.
b. Transmitted by the apple.
c. Reflected by the apple.
d. Absorbed by the apple.

5. What evidence do we have that light is made of waves?